Container



2 Sheets-Sheet l CONTAINER K. STUART ETAL June 5, 1951 Original FiledOct.

KmsERLy 'STUART ALLEN B. WlLsoN S'rauch Q Hoffman AJUIN? 5,11951 K.STUART ETAL 2,555,380

CONTAINER original Filed oct. 2e, 1940 v 2 sheets-sheet 2 .zT-'14.5 1:.j]

-T' 9./4 SMQ/MM Kmsanv STUART ALLEN B. WlLsaN Sfmvch @Hoffman wwwPatented June 5, 1951 CONTAINER Kimberlyk Stuart, 'Menasha, Wis.,an'dvAllen-B. `Wilson, Evanstomilll.; saidrWilson'assignor, bymesneassignments to Elizabeth R. B. Stuart, MenashaWiS.

"Original application October 26, 1940, Serial No. 363;060. f'Divide'dand this application kJanuary "21, 1946, Serial No.l642,544

f Claims. (Cl. 229-735) The present inventionA relates to containersfordpackaging foods, liquids ...and any other su-bstances vand .to methods.of .making .such .con-

-A'further object' of the invention-,isftoprovide a novel spirally woundcontainerhavingan integral built-in thermoplasticlining. Preferably,

Vtainers. More particularly,.our invention is conthe liningmaterialissheet'rubber hydrochloride. cernedwith spirally Wound tubularcontainers 5 IA further object of-the invention is to :provide whichare-linedtobe leak-proof and imprevious a novel spirally woundcontainerhaving asub to mechanical -or chemical action ofthe contents.stantially continuous, lining of material which is This isa division of,ourapplication Serial. No. Vmoisture-impervious .and Achemically rinert--with 363,060 filed October 26, 1940-which issuedas respect to thecontentsA of the container and UnitedStates Letters .Patent No.y2,393,347 on wherein aclosure member is sealed tothecon- January 22,1946. `tainer and further secured thereto ybya clenched This.` is also acontinuation-impart.of,ouryapmetal reinforcing rim. .plication SerialNo. l 272,516,1iled May `8, `1939 .Further objects of the inventionwill.presently which was copending with said application Serial appear asthe .descriptionproceeds in connection No. v 363,060 .and hassinCematured; into. United with the appended claims'andtheannexed draw-States Letters .Patent No. 2,281,889 dated ,May ings, inwhich: 5,1942.Figurevl `is an exploded view in section .of a The invention is.especia11ydesigned for Ipackagcontainer comprising atpreferredembodiment of ing food mixturesand liquids-in containers ,of theinvention, priorto assembly of the container suitable size for retailsale, vand .the `preferred bodywith the end closure members; embodimentof the invention to be hereinafter Figure 2 is a sectional Viewillustrating the `rst described has .been found. tobe Verysatisfactorystep in assembly of the container partsof Figure for papertbeer oansoftwo quart capacity or more. l wherein the bottomclosure member isattached Itwill be understood, however,..that. the scope of 25 tothecontainer body; the invention is not thus'limited but embraces Figure 3is anY enlarged fragmentarysection containers forany substances.illustratingthe adhesive bond between the foil It has heretofore beensuggested toline liquid linings of the bottom closure memberand thecarrying paper containers with foilor cellophane container body member;but such linings have generally been inserted into Figure 4 is asectional view illustrating the next otherwise, complete containers-.andthis presents step in assembly of the containerwhereina reindiflicultiesof assembly. In practicing our inforcing metal rim isclenched along. thejoint bevention, the lining .is incorporated` during manu- `tween thecontainer body and the bottom closure facture. of the` container wallsand toour knowlmember; edge We arethe iirstto make -a vspirallygwoundFigure 5 is a section illustratingthe complete container of paper orlike fibrous materialhaving .container wherein the top closure `memberor -such a smooth, substantially continuousbui1tin cover is attached tothe container body in the liner which is moisture and leak-proof andisirnsame manner as the bottom closure member; pervious to the chemicalaction of thevcontents. Figure 6 is adiagrammaticvview illustrating aWith the above in mind, itis a major object of method of making thetubular container body the present invention to provide a novelinexwherein the liner strip is wound with a butt seam pensive spirally.wound paper or like fibrous conbetween convolutions; tainer having abuilt-in lining of moisture-im- FigureGA illustrates application of theadpervious material .which is chemically inert ,to hesive to the buttseam by the inner body wall the contents of the container. strip,wherein Ythe strip is provided witha narrow -A further object of theinventionsv to .provide strip Of adhesive OHS inner SurfaCe; a novelspirally `wound container having a sub- Figure '7 is a sectionalong line'l-T of Figure l6 stantially continuous tubular. lining .of metal foil.illustrating the laminated .paper and. foil con- Preferably the foillining-.is.adhesively sealed by struction of the liner strip; ya speciallatex 4adhesive chemicallyinertto .the Figure 8 illustratesa variationof the method contents of thecontainer. of. FigureV 6 wherein the paper-and foil liner strip is wound with an overlapped adhesively securedseam;

Figure 9 is an exploded View in section similar to Figure 1 except thatthe container body and closure members are lined with a thermoplasticsheet material;

Figure 10 is a sectional View illustrating the first step in assembly ofthe container parts of Figure 9 wherein the bottom closure member isheat sealed to the container body;

Figure 11 is a sectional View illustrating the next step in assembly ofthe container of Figure 9 wherein a clenched metal rim is secured alongthe joint between the container body and the bottom closure member;

Figure 12 is a section illustrating the complete container having thetop closure member heat sealed to the container body and provided with aclenched metal rim;

Figure 13 illustrates a method of forming the liner employed in thetubular body member of the container of Figure 9, wherein a sheet ofthermoplastic material is lap wound on a mandrel and its seams are heatsealed by a hot roller;

Figure 14 illustrates a variation of the method illustrated in Figure 13wherein the thermoplastic strip is laminated to a strip of paper beforewinding on the mandrel;

Figure 15 is a section on line I5-I5 of Figure 14 illustrating thelaminated construction of the liner strip of Figure 14;

Figure 16 is a section online I6--I6 of Figure 14 illustrating the buttseam between the wound strip convolutions before heat sealing;

Figure 17 is a section illustrating the liner seam of Figure 16 after ithas been heat sealed; and

Figure 18 is a section through a flared end can provided with flatclosure members and lined according to the invention.

Our invention briefly comprises making a spirally wound tubularcontainer body having a substantially continuous inner lining which ismoisture and gas proof and chemically inert with respect to the contentsof the container, and providing the container with end closure memberslined with the same material as the container body. The linings of thecontainer body and the closure members are sealed to each other andcomprise a substantially continuous envelope surrounding the contents ofthe container.

Preferably the container is lined with aluminum foil or a thermoplasticsheet material such as rubber hydrochloride or Pliofilm.

An especially important feature of the invention is our novel manner ofmaking the tubular container body wherein we rst spirally wind suitablestrip material on a mandrel to form a tubular liner and then, aftersealing the seams of the liner, we build up further spiral layers ofrelatively heavy paper or like fibrous material until the desired wallthickness has been obtained. Where the liner material is sufficientlytough to withstand relatively rough handling and the tension requiredfor winding it on the mandrel, as with sheet rubber hydrochloride orPliolm, the initial step of making the liner comprises Winding anindividual strip of this material. Where, however, the material isrelatively fragile and easy to tear, as in the case of thin, lightaluminum foil, we prefer to laminate it to a strip of thin backing paperbefore winding.

Foil-lined container Referring to Figures 1-8, the container comprises atubular cylindrical body lil of heavy paper, cardboard, fiber-board orlike inexpensive fibrous material, having a tubular liner Il faced witha substantially continuous, smooth lining I2 of metal foil, such asaluminum foil. n the illustrated embodiment of the invention, thecontainer is provided with internally fitting shallow, cylindrical,cup-shaped bottom and top closure members I3 and I4 having foil liningsI5 and I6, respectively.

Closure members I3 and I4 are suitably formed from paper, cardboard,berboard or like fibrous material; and linings I5 and IB are cementedthereto by a suitable adhesive such as the latex adhesive described inStuart Patent No. 2,068,893.

Tubular container body ID is preferably constructed by the methodillustrated in Figure 6.

Tubular liner Il is shaped by spirally winding a laminated strip Il upona suitable rotatable mandrel I8. As illustrated in Figure '7, strip Ilcomprises a thin, tough, flexible sheet of paper I9 bonded in fullsurface engagement with a thin sheet of aluminum foil 2|. Preferablysheets I9 and 2| are adhesively bonded by the latex ad- I hesive abovedescribed.

Laminated strip I7 is spirally wound with its foil surface 2| contactingthe periphery of the mandrel so as to comprise the inner surface of theliner tube and adjacent edges of the Wound strip are disposed inabutting relation. The width of strip I1 and the pitch of the spiral inwhich it is wound on the mandrel are matters of choice depending on thetype 0f the container to be manufactured.

At the section indicated at 22 in Figure 6, thc liner tube consists ofspirally wound abutting coils which are maintained in this position onthe mandrel by winding tension. Beyond section 22, a narrow thin strip28 of paper or like material having its inner face coated with a freshlayer of adhesive is spirally wound upon and along the butt seam betweenladjacent coils of the liner tube. This adhesive is selected accordingto the use for which the container is intended, and a large number ofadhesives are available including the latex adhesive above described. Ingeneral any adhesive may be used which will retain its strength duringthe life of the container and will not be softened by or mix with thecontents of the container. This seals the butt seam at the sectionindicated at 22' in Figure 6. Just sufficient adhesive is supplied atthe butt joint to fill the seam and insure proper attachment of theadjoining coils, and no excess adhesive is transmitted to the mandrelsurface. Beyond section 22', a strip of paper, cardboard, or likefibrous material 23, the inner surface of which passes over a suitableadhesive coating roll 24, is spirally wound upon the liner tube. Strip23 is preferably appreciably thicker Iand stronger than the liner stripand is coated with the latex adhesive described above.

As strip 23 is spirally wound about the liner tube, it is adhesivelysecured thereto and thereby assists strip 20 in retaining theconvolutions of the liner tube in contiguous abutting relation. Strip2li prevents excess adhesive from the inner surface of strip 23 fromentering the butt seams between the convolutions of strip I1. Thisprevents oozing of excess adhesive to the mandrel surface. The pitch ofstrip 23 may be opposite to that of strip I'i if desired.

As shown in Figure 6A, strip 20 may be omitted and the inner surface ofstrip 23 coated with a thin strip of adhesive 23 located to falldirectly vclosure member s upon 'and along the butt seam. By carefullycontrollingjthe viscosity and amount of adhesive at A23", there is nooozing of the adhesive between the abutting edges 'f strip I7 o'nto themandrel surface.

u Beyond `the AWinding station of strip -23, a further strip 25 'similarto strip 23 is spirally Vtvound about the lmandrel 'exteriorly of Woundstrip v23 to build up a secondlayer ofhrelatively A suitable roll 26`coats the inner r' 4thick paper. face of strip 25 with our abovedescribed latex adhesive in the same manner as strip 23. Beyond strip25, additional strips Vare spirally wound and adhesively bondedK insuccession vuntil the container Vbody tubing is lbuilt up 4to'requiredwall thickness. The number of zlayers Wound about the liner tube is amatter of'choica YSince these latter Winding operations are conventionalin the spiral can winding art, further description of the same is deemedunnecessary to understand Vthe invention.

`After thecontainerbody tubinghasbeen built up'to required wallthickness, it is cut into individual container 'body lengthsV in theusual vvmanner and is ready for incorporation in the complete container.o v l Tubular container body II'I, made as above de scribed, comprises arelatively stiff Cylinder of spirally wound paper or like fibrous`lflflalu'rial having a substantially continuous Vinner surface of metalfoil. This inner surface of metal foil is smooth and uninterrupted'except "at the spiral liner seams. The space between these seams islled and sealed bythe latex adhesive l"supplied by strip 2B as abovedescribed. Strip 2!! and the several succeeding ladhe'sively securedpaper layers retain the coils of strip "I7 against separation 4 Whilethe usel oi the yabove-identified "latex Aadhesive is especially`satis?actory in practicing theinv'eniin because itis impvilis i0meisvture and chemically inert vvfithurespe'ctfto beer, foods, and 'mostmixtures andiliquids'vvhich fare usually pacliaged in'this manner, itisvWithin the scope of this inventionto employ any quick'ad'- hesive whichis non-toxic for the particularlcontents of the container. Theparticular adhesive is usually selected for its inertness`-ivith"respect ,to the contents of thejcontainer, Constructed tomclosure member I3 tothe container body byproviding a film orjlayerz'ljofvour` latex fadhesive between the 'adjacent fpilfsurfacesofjthfe closuremember and` body. Filmiselastic'and adheres very'strongly'tofthe -f'oilsurfaces. V

Many substances packagedvin sealed vcohtair1- ers contain orjproducegases, which develop'substantial internal pressures -"With'in VVthecontainer which may increaseito -`such proportions afs-to burst `theclosureqmember'seals. The canning'oi beeris a very' good exarnpleoil aproblem of this kind. In orderto reinforce 'theffsealfandibond betweenour container: body and thebottom elfosure member, We provide` the jointbetween them with a continuousfshap'ed clenched "metali' rim striphaving its 'opposite lat-eral Vedges biting `Vmore effective seal.

jinto'vj'the paper at opposite sides of the joint. The clenched rim 'andthe method and apparatus for applying it to the container vmay be'th'atAdisclosed in United States Letters VPate'r'i't No. 2,253,962 issued May26, 1942, but preferably We employ the serrated end rim disclosed inUnited States Letters Patent No. 2,342,715 issued February 29, 1944,which is especially suitable for securing closure members on containers.

Y 'After bottom closure member I3 has been'attabbed, the container isthen provided With its contents and top closure member I4 attached tothe container -body in substantially the same irianner as abovedescribed for bottom closure jmember 'I3 and as illustrated in Figure 5.

4The completecontain'er of Figure 5 comprises a 'sturdy cylindricalpaper vcan Whereinrthe top, 'bottom and inner side Walls are lined witha chemically inert, 4moisture-proof envelope which has been incorporatedinto the can during the method "of its making and assembly abovedescribed. The interior of the can is perfectly smooth and the vexposedfoil and adhesive portions of Vthe lining prevent leakage of thecontents through to the relatively porous outer Walls Il), I 3 and I4.The can is further reinn `forced against rough handling 'and thedevelopment of internal pressures by the elastic joints Aat "21' and byIrims 2B and 29 'which also give it a neat and pleasing appearanceexternally, an especially desirable factor in retail trade. g

Figure 8 illustrates an alternative method of VWinding laminated stripII upon the mandrel. The successive convolutions of the Vspiral areslightly overlapped, with foil face 2l `provided along a narrow area atone edge with a coating of our latex adhesive by a suitable roll `3| sothat, `during winding, successive convolutions'of the strip areadhesively secured to each other with alapped seam. The wound linertubing section 4indicated 'at `32 is provided With such additionallayers of paper as are required to build the container body tube todesired KWall thickness in the manner described in Figure 6.

It 'is ordinarily `a -matter of choice as to Whether a butt orlapped.seam is provided for the container liner. This choiceusually dependsupon the vnature of the material to be packaged. The'lapped seamrequires a `greater amount of material than the butt'seam, but itprovides a The butt seam is easier to Wind and is perfectly satisfactoryfor most purposes, however.

The `internal*surface i of `a rcontainer, body provided vvith a lappedseam liner of Figure 8 is 'substantially as smooth as in a containerhaving methods f of` making the "containen Referring "to Figure `9, the'tubular'container *body .30 is provide'dwith a tubular liner 33 ofAtlierrrloplastio sheet f' material. For purposes of Vthe invention*especially inthe canning of syrup,

beer, and other liquid foods and beveragesf'we have found that sheet'rubber hydrochloride known under the trade'name of Pliolm is verysatisfactory, but any other equivalent thermo- "plastic sheet materialwhich is impervious to moisture and *at the Sametime 'chemically-iesistuot to the factionfof the-contents ofthe-can may be employed. Thecontainer also comprises bottom and top end closure members 34 and 35,which are lined at 36 and 37, respectively, with the same thermoplasticsheet material. Closure members 34 and 35 `are suitably formed frompaper or like fibrous material similarly to closure members I3 and I4,and linings 36 and 3l are preferably uniformly bonded thereto in smoothintimate full surface engagement by our latex adhesive.

Figure 13 illustrates the initial step of a preferred manner ofmanufacturing container body 32. A thin sheet of rubber hydrochloride isspirally wound upon mandrel I8 to form the tubular liner sectionindicated at 39. Strip 38 is preferably wound in such manner thatadjacent narrow edge areas of the convolutions are lapped as indicatedin Figure 13 and these lapped areas are subjected to combined heat andpressure, as by heated roller 4I.

Roller 4I is maintained at a suiciently high temperature to soften theoverlapped strip areas which thereby fuse and become integral, and thepressure of roller 4I is sufficient to flatten this lapped fused scam todistribute the material uniformly and prevent undesirable bulges at theliner seams. The effect of subjecting the liner tubing to the heat andpressure of roller 4I is to fuse and Iweld the wound liner strip into acontinuous integral tube. Following this welding operation, successivelayers of paper or the like are spirally wrapped and adhesively securedupon and about the liner tube in the manner above described.

Roller 4I may beof any suitable length for insuring proper fusing of theseam of the liner tubing. Roller 4I is idly rotatably supported at theends of pivoted arms 42 and 43, which carry the electrical wires forsupplying current to the internal roller heater element, and is rotatedby reason of its frictional contact with the driven liner tubing.

During ordinary operating conditions, roller 4I is held in contact withthe surface of the liner tubing by its own weight and the force ofsprings 44 which react between washers 45 secured to control rods 46,pivotally connected to the outer ends of arms 42 and 43, and stationaryabutments 47. Rods 46 are suitably interconnected and the mechanismoperating mandrel I8 actuates suitable devices insuring that rods 46 aredisplaced downwardly automatically whenever rotation of the mandrelstops. This may be effected for example by a centrifugal switch 4i! orthe like at the mandrel drive controlling a solenoid assembly 43 adaptedto pull down rods 46. Springs 44 re-establish the roller on the tubularlining when the solenoid is de-energized. However, the exact details ofthis mechanism are not essential to a complete understanding of theinvention, it being only necessary that roller 4I be displaced from thesurface of the liner tubing while mandrel I8 is stationary.

While the above-described manner of applying heat for sealing the linertubing seams is preferable, equivalent methods may be used withoutdeparting from the spirit of the invention. For example, heated roller4| may be applied after one or more outer paper layers have been woundabout the liner tubing, care being taken to accomplish this before thepaper layers are so thick as to insulate the lining.

Beyond section 39, paper or fiber board strips are spirally wound andadhesively secured about the liner tube in the manner above describeduntil the container body tubing on mandrel I8 is built up to desiredwall thickness. The body tubing is then cut into lengths 30 which areready for assembly into the complete container.

Tubular container body 30 thus manufactured comprises a relatively stiffpaper cylinder which is mechanically strong and lined internally with asmooth uninterrupted coating of thermoplastic material. The relativelyslight bulges where the seams of strip 38 are welded together are sosmoothed and distributed along the container that they are notappreciable to the eye and do not interfere with the appearance of thecontainer.

In assembly of the container elements, bottom closure member 34 is rstinserted into container body 33 so that the arcuate face of lining 36 isin uniform contact with end .areas of lining 33. Heat and pressure arethen applied at the joint between closure member 34 and the containerbody in suicient degree to fuse the contacting areas of thermoplasticlinings 35 and 33 until they are integrally united as shown in Figure10. Pliofilm is such .an excellent conductor of heat that theapplication of a heated iron along the edge indicated at 34' in Figurel0 is suflicient to fuse the lining along the entire peripheral depth ofclosure member 34.

C-shaped rim 28 is then applied to the joint between body 3B and closuremember 34 is illustrated in Figure l1. After the container has beenprovided with its contents, upper closure member 35 is then heat sealedto the container body in the same manner as member 34 and C-shaped rim29 applied to reinforce the joint between closure member 35 and thecontainer body as illustrated in Figure 12.

The finished container thereby,1 comprises a spirally wound paper cancontinuously and integrally lined with thermoplastic material whichcomprises a complete envelope about the contents of the container andwhich is gas proof and moisture impervious and chemically inert withrespect to beer, food or other contents of the can. Furthermore, rubberhydrochloride or Pliolm possesses sufficient elasticity to withstandcontraction and expansion resulting from temperature variations withoutinjury to its sealing action. We have found that practically thethermoplastically sealed container provides a somewhat better bondbetween the container body and closure members than the adhesivelysealed foil lined container.

Figure 14 illustrates a further manner of forming the tubular liner forcontainer body 3U in the initial step of manufacturing that body. Whilesheet rubber hydrochloride is ordinarily sufficiently tough to withstandwinding tension, it may be desired to employ very thin sheets of thismaterial or to employ sheets of other thermoplastic material which aresusceptible to tearing. In such instances, We laminate the rubberhydrochloride to a thin flexible sheet of paper as illustrated inFigures 14 and 15 where liner strip 48 comprises a thin exible strip oftough paper 49 secured to a wider strip of sheet rubber hydrochloride orother thermoplastic 5 I. Preferably the paper and rubber hydrochloridesheets are uniformly bonded by our latex adhesive above described, andthe thermoplastic strip extends a substantial distance beyond thelateral edge of the paper strip as indicated at 52 in Figures 15 and 16.

As illustrated in Figures 14 and 16, strip 48 is wound upon mandrel I8spirally and the adjaafstasie l9 centA convolutions are so lapped thatthe double thickness edge of each convolution is lapped over theextended thermoplastic portion 52 of the preceding convolution. Thisrelation or" the lapped convolutions -is clearly illustrated in enlargedFigure "16.

Beyond the winding-station-of lstrip t3, heat and pressure applying`rollerlll Visapplied to the periphery oi the'wound-liner'tubing sectionindi cated at 55, and-this heat and pressure is sufficient to softenandweld theflapped Vareas Voi thermoplasticstripv 52 together to form thefused seamin'dicatedat 53 inf-Figure 17. During this operation, pressureofthe roller is sufficient to substantially align the paper baokings 49of the adjacent convolutions into substantially abutting relation asillustrated in Figure 17.

After the winding and heat sealing operations above described, theresulting liner tubing comprises a spirally wound strip of thin paperhaving its inner surface securely bonded and integrally lined with acoating of thermoplastic material. The liner tubing is then providedwith one or more spirally wound and adhesively secured paper or likelayers until desired wall thickness is attained as described above inthe other embodiments of the invention and the body tubing thus formedis cut to desired lengths. Where sheet rubber hydrochloride is employedat strips 49 and 5I may be of the same width and wound on the mandrelwith a butt seam between convolutions. Such a seam will seal uponapplication of heat and pressure similarly to the overlapped seam ofstrip 38 above described.

Figure 18 illustrates a further embodiment of the invention wherein thecan body comprises a spirally wound cylindrical 'tube 54 having flaredends 55 which terminate in relatively flat lip portion 56. Tube 54 ismanufactured by the usual methods of making such cans and is internallylined with a layer of moisture impervious, chemically resistant material57 which may be the metal foil or the thermoplastic sheet material abovedescribed and which is incorporated during the initial steps of formingthe tube according to the invention as above described.

As illustrated in Figure 18, lining 5l extends over lip portions 5S andthereby provides a seat for iiat closure members 58. Each closure member58 comprises a still circular cardboard memberV having an inner linerface 59 consisting of a sheet of metal foil or rubber hydrochlorideadhesively bonded thereto and adapted to engage lining 5l and thecontainer body in annular contact at lip 56.

Linings 59 and 5l are sealed together by our latex adhesive where thelinings are metal foil, or by heat pressure where they arethermoplastic. Reinforcing rims 28 and 29 are applied along the jointsin the manner above described.

The mandrel may be heated where the lining is non-thermoplastic as inFigures l-7 to hasten adhesive setting at the butt joint.

Our invention provides an inexpensive safe manner of packaging oils,syrup, beer and other beverages and liquid foods, other foods and likesubstances. The built-in lining insures that such substances do notcontact tinned or like surfaces which many people believe alter thetaste. The can joints are reinforced to withstand high internalpressures', and to eliminate breakage due to rough handling.

The combined strength o1" the elastic joints between the can closuremembers and body and the clenched metal rims therealong is such thatthese joints withstand higher linternal pressures than the paper canbody itself.

The invention may be embodied in other specific forms without'departingfrom the spirit or essential characteristics thereof. The presentembodiments are"there`fore 'to be considered in alllrespectsa'sillustrativeand fnot restrictive, the scope of the invention beingindicated by the appended claims rather than by the foregoingdescription, and all changes which come within the meaning and range ofequivalency 1of'the claims are therefore intended to be embracedtherein.

What is claimed and desired to be secured by United States LettersPatent is:

l. A container comprising a spirally wound tube of paper or like brousmaterial; a thin spirally wound moisture impervious wall lining saidtube, means adhesively securing said wall to said tube; covers closingopposite ends of said tube, each oI" said covers being lined withmoisture impervious material; means sealing the linings of said coversand tube in moisture tight relation so that the entire inner surface ofsaid container comprises a substantially continuous moisture imperviousenvelope, and metal rims further securing said covers upon said tube,each of said rims comprising a narrow strip of metal disposed about andalong the joint between the cover and tube and transversely arcuatelybent so that its opposite lateral edges bite a substantial distance intothe materials of said cover and tube at opposite sides of said jointwith a tight grip.

2. A container comprising a spirally wound tube open at one end, aclosure member at the other end of said tube having 'a peripheralportion overlapping With said tube, a heat sealed continuousthermoplastic lining on the inner side and bottom walls of saidcontainer and providing a flexible seal between the closure member andtube and a substantially C-shaped continuous metal rim clenched alongand about the joint formed by the overlap between said closure memberand tube, said rim having its opposite lateral edges imbedded in saidclosure member and tube respectively.

3. In a container, a spirally wound tube of paper or like fibrousmaterial an integral lining of spirally wound, heat fused thermoplasticsheet material bonded to the tube an end closure member for said tubefaced with thermoplastic material and heat sealed to said tube alongcoextensive peripheral portions, and a continuous rim substantiallyC-shaped in cross-section clenched about and along the joint provided bysaid coeXtensive peripheral portions of the tube and closure member.

4. A container comprising a spirally wound paper tube, covers atopposite ends of said tube, a continuous integral lining ofthermoplastic sheet material bonded to said container, said tube andeach cover being formed with coextensive sealed.

KIMBERLY STUART. ALLEN B. WILSON.

REFERENCES CITED The following references are of record ,in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 485,158 Cwerdinski Oct. 25, 18921,299,031 Reynolds Apr. 1, 1919 Number 12 Name Date Greenewald Oct. 27,1925 Hulbert Aug. 31, 1926 Halle July 2, 1935 Magill June 29, 1937Cordiano Sept. 27, 1938 Fisher et a1 June 20, 1939 Von Sydow et a1. June20, 1939 Harrison Sept. 19, 1939 Diot Dec. 12, 1939 Karl Dec. 31, 1940Lenox Nov. 11, 1941 Stuart et a1 May 5, 1942 Graves et a1 Mar. 23, 1943

